/* Version 2: preserve supplied skins, give the active activity the classroom space. */
.app-shell{max-width:1880px;padding:16px clamp(14px,2.2vw,42px) 16px}
.header{min-height:88px;gap:12px}.header-nav{gap:4px}.nav-button{padding:8px clamp(10px,1vw,20px);font-size:clamp(16px,1.2vw,22px)}
.active-class{align-self:flex-start;margin:8px 0 0 16px;padding:6px 14px;border-radius:20px;background:var(--cream);font-size:14px;min-height:36px;font-weight:700}
.workspace{max-width:none;margin-top:10px;grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr);gap:clamp(24px,3vw,58px);flex:1}
.left-column{align-items:center}.classroom-heading{width:100%;margin:0 0 3px}.classroom-heading .eyebrow{display:none}.message-button{font-size:clamp(20px,1.5vw,28px)}
.activity-view,.tool-panel{width:100%;max-width:none}.tool-panel{margin-top:6px;padding:16px clamp(10px,1.4vw,26px) 20px;min-height:clamp(380px,49vh,610px)}
.tool-panel-header{margin-bottom:18px}.tool-panel-header h1{font-size:clamp(30px,2.5vw,46px)}
#timer-view{width:min(100%,780px,calc((100svh - 370px)*1.4545));min-width:300px}
.timer-options{gap:10px}.preset-options button{min-height:44px;font-size:16px;padding:6px 12px}.timer-secondary .text-button{min-height:44px;font-size:15px}.timer-secondary .icon{width:21px;height:21px}
.tool-tray{width:100%;max-width:1050px;margin-top:20px}.tool-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;padding-top:8px}.tile-picture{max-width:clamp(78px,7vw,128px)}.tile-label{font-size:clamp(14px,1.1vw,21px)}.tray-ribbon{width:62%;margin-bottom:-5%}.tray-ribbon h2{font-size:clamp(24px,2.2vw,38px)}
.tool-panel .small-button,.group-controls input,.tool-panel .icon-button{min-height:44px}.group-controls{gap:16px;margin-bottom:20px;font-size:20px;flex-wrap:wrap}.group-controls input{width:70px;font-size:22px}.group-controls .small-button{font-size:16px}
.groups-result{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;max-height:none;overflow:visible;min-height:260px;margin:0 0 20px}.group-card{padding:18px;border-radius:18px}.group-card h3{font-size:clamp(22px,1.5vw,30px);margin-bottom:12px}.group-people{gap:8px}.group-person{font-size:clamp(18px,1.35vw,26px);padding:5px 10px}.group-empty p{font-size:22px}.group-empty{align-self:center}
.roster-summary{font-weight:700}.privacy-note{font-size:13px}.wheel-area{width:clamp(230px,20vw,330px);max-width:90%;margin:8px auto 12px}.result-label{font-size:clamp(26px,2.2vw,40px)}.picker-options{font-size:16px;flex-wrap:wrap}.dice-stage{min-height:260px}.board-canvas-wrap{aspect-ratio:1.8}.board-toolbar{flex-wrap:wrap}.brush-label{font-size:15px}

.tv-drawer{margin-top:12px;min-width:0}
.video-mount,.video-mount iframe{width:100%;height:100%;border:0;display:block}.video-placeholder{background:#151b22;padding:12px;color:#f4f5f6;gap:12px}.video-placeholder::before,.video-placeholder::after{display:none}
#video-empty-title{font-family:var(--body-font);font-size:clamp(13px,2.7cqw,20px);font-weight:500;max-width:95%;overflow-wrap:anywhere;margin:0}#video-empty-caption{font-size:12px;max-width:90%}#video-empty-caption:empty{display:none}.screen-choose{background:#e8edf2;color:#132638;box-shadow:none;min-height:44px;font-size:14px;margin:0;padding:8px 16px}.screen-choose .icon{width:18px;height:18px}
.video-caption{margin-top:-6px;font-size:13px;overflow-wrap:anywhere}.video-fine-print{font-size:12px}.tv-heading{padding-bottom:8px}.tv-change{min-height:44px;font-size:16px}.tv-toggle{z-index:5}
body.tv-closed .workspace{grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr)}body.tv-closed .left-column{width:min(1200px,100%)}
.site-footer{margin-top:16px}.presenting .workspace{margin-top:40px}.presenting .activity-view{width:100%}.presenting #timer-view{width:min(100%,1000px,calc((100svh - 150px)*1.4545))}.presenting .tool-panel{min-height:65vh}.presenting .privacy-note,.presenting .roster-link{display:none}
/* Central class editor */
.students-modal{width:min(760px,calc(100vw - 32px));max-height:calc(100svh - 32px)}.class-toolbar{display:flex;gap:12px;align-items:end;margin:18px 0;flex-wrap:wrap}.class-toolbar label{flex:1;min-width:160px;display:flex;flex-direction:column;gap:6px;font-weight:700}.class-toolbar select,.class-toolbar input{width:100%;min-height:46px;border:2px solid #b9ccdc;border-radius:12px;padding:8px 12px;background:#fff;color:var(--navy)}.students-modal textarea{width:100%;font-size:18px;line-height:1.5}.students-modal .small-button{min-height:46px}.student-list{list-style:none;margin:12px 0;padding:0;display:grid;gap:8px}.student-list li{display:flex;gap:8px}.student-list input{min-width:0;flex:1;font-size:17px}.student-details summary,.add-by-url summary{min-height:44px;padding:10px 0;cursor:pointer;font-weight:700}.class-file-actions{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0;border-top:1px solid #d4c8b3;padding-top:18px}#students-status{min-height:1.5em}.students-modal .field-label{flex-wrap:wrap}
.video-library{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.video-choice{display:flex;flex-direction:column;gap:8px;padding:10px;text-align:left;align-items:stretch}.video-choice img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:9px}.video-choice>span{overflow-wrap:anywhere;font-size:16px}.video-choice[aria-pressed=true]{outline:3px solid var(--blue);background:#e7f4ff}.video-selected{font-weight:700;color:var(--blue);font-size:13px!important}.add-by-url{border-top:1px solid #d4c8b3;margin-top:20px}
@media(min-width:1650px){.groups-result{grid-template-columns:repeat(2,minmax(0,1fr))}.tool-panel{min-height:540px}.tv-drawer{margin-top:12px}.header-nav{gap:12px}}
@media(min-width:1001px) and (max-height:820px){.app-shell{padding-top:10px}.header{min-height:76px}.active-class{margin-top:4px}.workspace{margin-top:6px}.tool-panel{margin-top:0;min-height:380px;padding-top:8px}.tool-panel-header{margin-bottom:12px}.groups-result{min-height:210px;gap:10px}.group-card{padding:12px}.tool-tray{margin-top:14px}.tray-ribbon{width:60%;margin-bottom:-5%}.tile-picture{max-width:76px}.tile-label{font-size:14px}.tv-heading .eyebrow{display:none}.wheel-area{width:230px}.dice-stage{min-height:200px}.timer-options{gap:3px}.preset-options button{font-size:14px;padding:4px 8px}.timer-secondary .text-button{font-size:13px}}
@media(max-width:1200px){.header{flex-wrap:wrap}.header-nav{order:3;flex:1 1 100%;justify-content:center}.header-actions{margin-left:auto}.active-class{font-size:13px}.workspace{gap:20px}.tool-panel{border-width:16px;padding:10px}.group-controls{font-size:18px;gap:10px}.tool-panel .overline{font-size:10px}}
@media(max-width:1000px){.app-shell{padding:12px 18px}.workspace{grid-template-columns:1fr!important;max-width:900px;margin-top:10px}.activity-view,.tool-panel{width:100%}.tool-panel{min-height:440px}.tool-tray{max-width:900px}.left-column{align-items:center}#timer-view{width:min(100%,680px);min-width:0}.tv-drawer{max-width:620px;width:100%;margin-top:14px}.tile-picture{max-width:110px}.tile-label{font-size:16px}.wheel-area{width:300px}.group-person{font-size:22px}.tv-toggle{bottom:22px;top:auto}.presenting .workspace{margin-top:50px}.board-canvas-wrap{aspect-ratio:1.5}.site-footer{padding-right:50px}}
@media(max-width:600px){.app-shell{padding:8px}.header{padding:0;gap:6px;border-width:12px}.brand strong{font-size:22px}.brand-small{font-size:8px}.brand-star{display:none}.header-actions{gap:3px}.circle-control{width:44px;height:44px}.present-button{min-width:44px;padding:8px 10px}.present-button>span:last-child{display:none}.header-nav{justify-content:space-between;gap:2px;width:100%}.nav-button{font-size:13px;min-height:44px;padding:8px 5px;gap:4px}.nav-button .icon{width:16px;height:16px}.active-class{margin-left:6px;max-width:95%;overflow-wrap:anywhere}.classroom-heading{margin-top:4px}.message-button{font-size:20px}.tool-panel{min-height:400px;padding:10px 4px;border-width:14px}.tool-panel-header h1{font-size:30px}.tool-panel-header .overline{font-size:9px;letter-spacing:1px}.tool-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px 4px}.tile-picture{max-width:92px}.tile-label{font-size:15px}.tray-ribbon{width:85%;margin-bottom:-7%}.tray-ribbon h2{font-size:25px}.tool-tray{margin-top:18px}.groups-result{gap:8px;min-height:240px}.group-card{padding:10px}.group-card h3{font-size:21px}.group-person{font-size:18px;padding:4px 7px}.group-controls{font-size:16px}.group-controls .small-button{font-size:14px}.group-empty p{font-size:19px}.wheel-area{width:min(270px,90%)}.picker-options{font-size:14px}.preset-options{flex-wrap:wrap}.preset-options button{min-height:44px;font-size:14px}.timer-secondary .text-button{min-height:44px;font-size:14px}.board-canvas-wrap{aspect-ratio:1/1.1}.board-toolbar .icon-button{width:44px}.brush-label{margin:0}.video-library{grid-template-columns:1fr}.tv-heading .eyebrow{display:none}.tv-heading{justify-content:center}.tv-toggle{width:50px;height:66px}.video-caption{font-size:12px}.students-modal{padding:20px 16px}.class-toolbar{gap:8px}.class-toolbar label{min-width:140px}.class-file-actions .small-button{font-size:14px}.student-list input{width:50%}}
@media(max-width:355px){.nav-button [data-icon]{display:none}.nav-button{font-size:13px;padding:8px 6px}.groups-result{grid-template-columns:1fr}.group-controls{gap:8px}.header-actions{gap:0}.brand strong{font-size:20px}}
/* Keep setup context inside the header so activity content starts sooner. */
.brand-block{display:flex;flex-direction:column;gap:2px;min-width:0}.brand-block .active-class{align-self:center;background:transparent;margin:0;padding:2px 4px;min-height:24px;font-size:12px;max-width:280px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.header .brand strong{font-size:26px}.header .brand-small{font-size:9px}.classroom-heading{margin:0 0 0}.message-button{font-size:24px}.tool-panel{padding-top:10px;padding-bottom:12px}.tool-panel-header{margin-bottom:10px}.group-controls{margin:8px 0 14px}.group-card{padding:12px}.group-card h3{font-size:26px;line-height:1.2;margin:0 0 8px}.group-people{gap:6px}.group-person{font-size:22px;line-height:1.35;padding:4px 8px}.groups-result{gap:12px;margin-bottom:14px;min-height:240px}.tool-panel .privacy-note{margin-top:12px}.tool-tray{margin-top:14px}.tile-picture{max-width:100px}.tray-ribbon h2{font-size:30px}#timer-view{width:min(100%,730px,calc((100svh - 380px)*1.4545))}.video-caption{margin-top:-10px}.tv-drawer{margin-top:0}
@media(min-width:1001px){.groups-result{grid-auto-rows:minmax(140px,auto)}.tool-panel{min-height:500px}.group-empty{min-height:150px}.tool-panel-header h1{font-size:38px}.tv-heading .eyebrow{display:none}.tv-heading{justify-content:center}.tv-drawer{margin-top:0}.tv-change{font-size:15px}}
@media(min-width:1001px) and (max-height:820px){.header{border-top-width:12px;border-bottom-width:12px}.brand-block .active-class{font-size:11px}.tool-panel{min-height:340px;padding-top:4px;padding-bottom:6px}.tool-panel-header{margin-bottom:6px}.tool-panel-header h1{font-size:30px}.group-card{padding:8px}.group-card h3{font-size:21px}.group-person{font-size:18px;padding:3px 6px}.groups-result{grid-auto-rows:minmax(100px,auto);min-height:200px;gap:8px}.group-controls{margin:6px 0 10px}.tile-picture{max-width:72px}.tray-ribbon h2{font-size:24px}.video-fine-print{font-size:11px}}
@media(max-width:1000px){.brand-block .active-class{align-self:flex-start;max-width:250px}.tile-picture{max-width:100px}#timer-view{width:min(100%,680px)}.message-button{font-size:22px}}
@media(max-width:600px){.header .brand strong{font-size:21px}.header .brand-small{font-size:8px}.brand-block .active-class{font-size:10px;max-width:190px}.group-card{padding:8px}.group-card h3{font-size:21px}.group-person{font-size:18px}.tile-picture{max-width:85px}.tray-ribbon h2{font-size:25px}.message-button{font-size:20px}.group-controls .small-button{font-size:13px}}

.tv-toggle{right:0}

.channel-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:16px 0 8px}.channel-heading strong{color:var(--blue);font-size:20px}.channel-heading a{font-size:13px;text-underline-offset:3px}.video-results{margin:8px 0;color:var(--muted);font-size:14px}.video-results:empty{display:none}#video-search{width:100%;min-height:44px}#channel-status{font-size:14px;margin:12px 0}

.video-choice img{height:auto;flex-shrink:0}.video-choice .video-selected{margin-top:auto}#video-search{border:1px solid #9fbdd0;border-radius:12px;padding:11px 14px;background:#fffdf7;color:var(--navy);font:inherit}#video-search:focus-visible{outline:3px solid #92caff;outline-offset:2px}